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| Southampton Tunnel : ウィキペディア英語版 | Southampton Tunnel
Southampton Civic Centre Tunnel is a railway tunnel beneath the Civic Centre in the centre of the Hampshire city of Southampton, in England. Opening in August 1847, its construction linked the stations of Southampton Terminus and Southampton West End (later moved and now known as Southampton Central).〔 The construction of the Southampton and Dorchester Railway linked London through Southampton to towns further west, such as Poole and Dorchester. The through link also accelerated the expansion of Bournemouth. ==Construction and operating problems==
Geological problems plagued the construction and delayed its opening. The fundamental issue was that the ground was already compromised by the partial construction of the Salisbury and Southampton Canal tunnel, which the railway tunnel crosses at an acute angle and slightly higher. Because the canal tunnel was lined with clay "puddle" it collects water which ends up in the rail tunnel making the latter very wet. In the 1960s an access was cut into the canal tunnel in order to examine it, although this was later sealed behind a new segmental wall structure when, between 1983 and 1985, the tunnel underwent extensive engineering works () and the line through it was worked as a single line for long periods while remedial work was carried out.〔(dead link )〕 A narrow gauge railway was set up as part of these works.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Southampton Tunnel」の詳細全文を読む
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